import Vue from 'vue'
import Router from 'vue-router'
/* Layout */
import Layout from '@/layout'
/*
import _import from '@/utils/_import'
*/
/* Router Modules */
import { getMenus } from '@/api/user'

Vue.use(Router)

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/guide/essentials/router-and-nav.html
 *
 * hidden: true                   if set true, item will not show in the sidebar(default is false)
 * alwaysShow: true               if set true, will always show the root menu
 *                                if not set alwaysShow, when item has more than one children route,
 *                                it will becomes nested mode, otherwise not show the root menu
 * redirect: noRedirect           if set noRedirect will no redirect in the breadcrumb
 * name:'router-name'             the name is used by <keep-alive> (must set!!!)
 * meta : {
    roles: ['admin','editor']    control the page roles (you can set multiple roles)
    title: 'title'               the name show in sidebar and breadcrumb (recommend set)
    icon: 'svg-name'             the icon show in the sidebar
    noCache: true                if set true, the page will no be cached(default is false)
    affix: true                  if set true, the tag will affix in the tags-view
    breadcrumb: false            if set false, the item will hidden in breadcrumb(default is true)
    activeMenu: '/example/list'  if set path, the sidebar will highlight the path you set
  }
 */

export function convertMenu(menu, menus, apis) {
  if (menu == null) {
    const children = []
    menus.forEach(v => {
      if (v.isApi) {
        apis.push(v)
      } else {
        children.push(v)
      }
    })
    menus = children
    menus.forEach(v => {
      convertMenu(v, menus, apis)
    })
  } else {
    menu.meta = {}
    menu.meta.title = menu.title
    menu.meta.noCache = false
    // menu.meta.breadcrumb = false
    if (!menu.parentId) {
      menu.meta.icon = menu.icon || 'documentation'
      menu.component = Layout
    } else {
      const component = menu.component
      menu.component = resolve => require([`@/views${component}`], resolve)
      // menu.component = _import(component)
    }
    const children = []
    menu.children.forEach(v => {
      if (v.isApi) {
        apis.push(v)
      } else {
        children.push(v)
      }
    })
    menu.children = children
    menu.children.forEach(v => {
      convertMenu(v, menus, apis)
      menu.redirect = menu.redirect || 'noRedirect'
    })
  }
  return menus
}

export async function getAsyncMenus() {
  return new Promise((resolve, reject) => {
    getMenus().then(response => {
      const { data } = response
      const apis = []
      const menus = convertMenu(null, data, apis)
      menus.push({ path: '*', redirect: '/404', hidden: true })
      resolve({ menus, apis })
    })
  })
}

/**
 * constantRoutes
 * a base page that does not have permission requirements
 * all roles can be accessed
 */
export const constantRoutes = [
  {
    path: '/redirect',
    component: Layout,
    hidden: true,
    children: [
      {
        path: '/redirect/:path(.*)',
        component: () => import('@/views/redirect/index')
      }
    ]
  },
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },
  {
    path: '/auth-redirect',
    component: () => import('@/views/login/auth-redirect'),
    hidden: true
  },
  {
    path: '/404',
    component: () => import('@/views/error-page/404'),
    hidden: true
  },
  {
    path: '/401',
    component: () => import('@/views/error-page/401'),
    hidden: true
  },
  {
    path: '/',
    component: Layout,
    redirect: '/home',
    children: [
      {
        path: 'home',
        component: () => import('@/views/home/index'),
        name: 'Home',
        meta: { title: '首页', icon: 'dashboard', affix: true }
      }
    ]
  },
  {
    path: '/debug',
    component: Layout,
    hidden: true,
    redirect: '/debug/index',
    children: [
      {
        path: 'index',
        component: () => import('@/views/test/test'),
        name: 'Test',
        meta: { title: '测试页面', icon: 'documentation', noCache: true }
      }
    ]
  },
  {
    path: '/error-log',
    hidden: true,
    component: Layout,
    children: [
      {
        path: 'log',
        component: () => import('@/views/error-log/index'),
        name: 'ErrorLog',
        meta: { title: 'Error Log', icon: 'bug' }
      }
    ]
  },
  {
    path: '/profile',
    component: Layout,
    redirect: '/profile/index',
    hidden: true,
    children: [
      {
        path: 'index',
        component: () => import('@/views/profile/index'),
        name: 'Profile',
        meta: { title: 'Profile', icon: 'user', noCache: true }
      }
    ]
  }
]

/**
 * asyncRoutes
 * the routes that need to be dynamically loaded based on user roles
 */
export const asyncRoutes = [
  // 404 page must be placed at the end !!!
  { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  // mode: 'history', // require service support
  base: '/admin',
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
})

const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}

export default router
